When I turned on the Ensoniq MR RACK, the unit is dead. I couldn’t find a fuse when I opened up the unit. Does the Ensoniq MR RACK have a fuse? If so, where is it located? I can’t find a repair manual on-line specific to the Ensoniq MR RACK. The only repair manual I found was for the MR 61 and MR 76 keyboards?
there will be a fuse on the SMPS. I haven’t opened up the MR Rack in a while but i’m due to do it in the next month or so to fix the volume pot.
But if that fuse has gone you have a short in your SMPS so you can’t just change it without first attending tot he SMPS. You could just replace the SMPS with another unit and work out the voltages 5v, 12, -12v probably. Lots of SMPS much better, much more efficient and much smaller than the one in the MR Rack
Put up photos if you can.